#include "HX711.h"
#include <LiquidCrystal.h>
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
#define DOUT  3
#define CLK  2

HX711 scale;

float calibration_factor = -46000;

void setup() {
  scale.begin(DOUT, CLK);
  scale.set_scale();
  scale.tare();

  long zero_factor = scale.read_average();

  lcd.begin(16, 2);
  lcd.print(" MIERNIK ");
  lcd.setCursor(0,1);
  lcd.print(" TENSOMETRYCZNY ");
  delay(2000);
  lcd.clear();
}

void loop() {

  scale.set_scale(calibration_factor);

  float reading = scale.get_units();
  if (reading < 0.09)
    reading = 0;

  lcd.setCursor(0,0);
  lcd.print("Sila nacisku:");
  int o3 = 0;
  float w = (reading * 9.81)*100;
  w = floor(w);
  int o1 = (int)w%10;
  int o2 = ((int)w%100 - o1)/10;
  if (w > 10000)
   o3 = ((int)w%100000 - o2)/100;
  else if (w > 1000)
   o3 = ((int)w%10000 - o2)/100;
  else
   o3 = ((int)w%1000 - o2)/100;

  lcd.setCursor(0,1);
  lcd.print("       ");
  lcd.setCursor(0,1);
  lcd.print(o3);
  lcd.print(".");
  lcd.print(o2);
  lcd.print(o1);
  lcd.print(" N ");

  delay(1000);
}